Hello,
My dng files from LR CC2015.10.1 render with a circumferential streaked zone with all methods. A previous post was resolved with automatic sorting. That did not change my result. (see: streaks on edges of renders by dansroka » 28.06.2016 07:31). My result looks exactly like that.
Using HF 6.7.1.
Thanks, John

Please upload your stack to our server (as described at http://www.heliconsoft.com/ftp-server/) and we will see what is happening.
If you are user of GoogleDrive, DropBox, OneDrive or other cloud service, you can upload your files there and send us a link.

[quote="Stas Yatsenko"]Please upload your stack to our server (as described at http://www.heliconsoft.com/ftp-server/) and we will see what is happening.
Uploaded files directly to your server in folder "For Helicon_dodsonmd".
Thanks for the help.

Thanks for the help. I'll give it a try. Could you explain the reasoning behind your advice? I'll be using HF quite a bit in the next few weeks, and I'd like to understand as much about using the program as possible.

The stack should be shot from one point (foreground) to another point (background), not in random order. In your case the program cannot clearly find the direction of the stack. Most probably this is due to moving objects in the scene.